mirror of
https://github.com/DrBeef/JKXR.git
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4597b03873
Opens in Android Studio but haven't even tried to build it yet (it won't.. I know that much!)
679 lines
16 KiB
C
679 lines
16 KiB
C
/*
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zip_close.c -- close zip archive and update changes
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Copyright (C) 1999-2008 Dieter Baron and Thomas Klausner
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This file is part of libzip, a library to manipulate ZIP archives.
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The authors can be contacted at <libzip@nih.at>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. The names of the authors may not be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "zipint.h"
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static int add_data(struct zip *, struct zip_source *, struct zip_dirent *,
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FILE *);
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static int add_data_comp(zip_source_callback, void *, struct zip_stat *,
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FILE *, struct zip_error *);
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static int add_data_uncomp(struct zip *, zip_source_callback, void *,
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struct zip_stat *, FILE *);
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static void ch_set_error(struct zip_error *, zip_source_callback, void *);
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static int copy_data(FILE *, off_t, FILE *, struct zip_error *);
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static int write_cdir(struct zip *, struct zip_cdir *, FILE *);
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static int _zip_cdir_set_comment(struct zip_cdir *, struct zip *);
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static int _zip_changed(struct zip *, int *);
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static char *_zip_create_temp_output(struct zip *, FILE **);
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static int _zip_torrentzip_cmp(const void *, const void *);
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struct filelist {
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int idx;
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const char *name;
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};
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ZIP_EXTERN int
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zip_close(struct zip *za)
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{
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int survivors;
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int i, j, error;
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char *temp;
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FILE *out;
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mode_t mask;
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struct zip_cdir *cd;
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struct zip_dirent de;
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struct filelist *filelist;
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int reopen_on_error;
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int new_torrentzip;
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reopen_on_error = 0;
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if (za == NULL)
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return -1;
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if (!_zip_changed(za, &survivors)) {
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_zip_free(za);
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return 0;
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}
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/* don't create zip files with no entries */
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if (survivors == 0) {
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if (za->zn && za->zp) {
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if (remove(za->zn) != 0) {
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_zip_error_set(&za->error, ZIP_ER_REMOVE, errno);
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return -1;
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}
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}
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_zip_free(za);
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return 0;
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}
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if ((filelist=(struct filelist *)malloc(sizeof(filelist[0])*survivors))
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== NULL)
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return -1;
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if ((cd=_zip_cdir_new(survivors, &za->error)) == NULL) {
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free(filelist);
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return -1;
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}
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for (i=0; i<survivors; i++)
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_zip_dirent_init(&cd->entry[i]);
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/* archive comment is special for torrentzip */
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if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0)) {
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cd->comment = _zip_memdup(TORRENT_SIG "XXXXXXXX",
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TORRENT_SIG_LEN + TORRENT_CRC_LEN,
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&za->error);
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if (cd->comment == NULL) {
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_zip_cdir_free(cd);
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free(filelist);
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return -1;
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}
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cd->comment_len = TORRENT_SIG_LEN + TORRENT_CRC_LEN;
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}
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else if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, ZIP_FL_UNCHANGED) == 0) {
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if (_zip_cdir_set_comment(cd, za) == -1) {
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_zip_cdir_free(cd);
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free(filelist);
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return -1;
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}
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}
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if ((temp=_zip_create_temp_output(za, &out)) == NULL) {
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_zip_cdir_free(cd);
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free(filelist);
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return -1;
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}
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/* create list of files with index into original archive */
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for (i=j=0; i<za->nentry; i++) {
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if (za->entry[i].state == ZIP_ST_DELETED)
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continue;
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filelist[j].idx = i;
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filelist[j].name = zip_get_name(za, i, 0);
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j++;
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}
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if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0))
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qsort(filelist, survivors, sizeof(filelist[0]),
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_zip_torrentzip_cmp);
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new_torrentzip = (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0) == 1
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&& zip_get_archive_flag(za, ZIP_AFL_TORRENT,
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ZIP_FL_UNCHANGED) == 0);
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error = 0;
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for (j=0; j<survivors; j++) {
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i = filelist[j].idx;
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/* create new local directory entry */
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if (ZIP_ENTRY_DATA_CHANGED(za->entry+i) || new_torrentzip) {
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_zip_dirent_init(&de);
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if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0))
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_zip_dirent_torrent_normalize(&de);
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/* use it as central directory entry */
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memcpy(cd->entry+j, &de, sizeof(cd->entry[j]));
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/* set/update file name */
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if (za->entry[i].ch_filename == NULL) {
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if (za->entry[i].state == ZIP_ST_ADDED) {
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de.filename = strdup("-");
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de.filename_len = 1;
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cd->entry[j].filename = "-";
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cd->entry[j].filename_len = 1;
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}
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else {
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de.filename = strdup(za->cdir->entry[i].filename);
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de.filename_len = strlen(de.filename);
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cd->entry[j].filename = za->cdir->entry[i].filename;
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cd->entry[j].filename_len = de.filename_len;
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}
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}
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}
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else {
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/* copy existing directory entries */
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if (fseeko(za->zp, za->cdir->entry[i].offset, SEEK_SET) != 0) {
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_zip_error_set(&za->error, ZIP_ER_SEEK, errno);
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error = 1;
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break;
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}
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if (_zip_dirent_read(&de, za->zp, NULL, NULL, 1,
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&za->error) != 0) {
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error = 1;
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break;
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}
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memcpy(cd->entry+j, za->cdir->entry+i, sizeof(cd->entry[j]));
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if (de.bitflags & ZIP_GPBF_DATA_DESCRIPTOR) {
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de.crc = za->cdir->entry[i].crc;
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de.comp_size = za->cdir->entry[i].comp_size;
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de.uncomp_size = za->cdir->entry[i].uncomp_size;
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de.bitflags &= ~ZIP_GPBF_DATA_DESCRIPTOR;
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cd->entry[j].bitflags &= ~ZIP_GPBF_DATA_DESCRIPTOR;
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}
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}
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if (za->entry[i].ch_filename) {
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free(de.filename);
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if ((de.filename=strdup(za->entry[i].ch_filename)) == NULL) {
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error = 1;
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break;
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}
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de.filename_len = strlen(de.filename);
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cd->entry[j].filename = za->entry[i].ch_filename;
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cd->entry[j].filename_len = de.filename_len;
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}
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if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0) == 0
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&& za->entry[i].ch_comment_len != -1) {
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/* as the rest of cd entries, its malloc/free is done by za */
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cd->entry[j].comment = za->entry[i].ch_comment;
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cd->entry[j].comment_len = za->entry[i].ch_comment_len;
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}
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cd->entry[j].offset = ftello(out);
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if (ZIP_ENTRY_DATA_CHANGED(za->entry+i) || new_torrentzip) {
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struct zip_source *zs;
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zs = NULL;
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if (!ZIP_ENTRY_DATA_CHANGED(za->entry+i)) {
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if ((zs=zip_source_zip(za, za, i, ZIP_FL_RECOMPRESS, 0, -1))
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== NULL) {
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error = 1;
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break;
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}
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}
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if (add_data(za, zs ? zs : za->entry[i].source, &de, out) < 0) {
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error = 1;
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break;
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}
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cd->entry[j].last_mod = de.last_mod;
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cd->entry[j].comp_method = de.comp_method;
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cd->entry[j].comp_size = de.comp_size;
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cd->entry[j].uncomp_size = de.uncomp_size;
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cd->entry[j].crc = de.crc;
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}
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else {
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if (_zip_dirent_write(&de, out, 1, &za->error) < 0) {
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error = 1;
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break;
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}
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/* we just read the local dirent, file is at correct position */
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if (copy_data(za->zp, cd->entry[j].comp_size, out,
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&za->error) < 0) {
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error = 1;
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break;
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}
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}
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_zip_dirent_finalize(&de);
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}
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free(filelist);
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if (!error) {
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if (write_cdir(za, cd, out) < 0)
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error = 1;
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}
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/* pointers in cd entries are owned by za */
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cd->nentry = 0;
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_zip_cdir_free(cd);
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if (error) {
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_zip_dirent_finalize(&de);
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fclose(out);
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remove(temp);
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free(temp);
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return -1;
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}
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if (fclose(out) != 0) {
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_zip_error_set(&za->error, ZIP_ER_CLOSE, errno);
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remove(temp);
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free(temp);
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return -1;
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}
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if (za->zp) {
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fclose(za->zp);
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za->zp = NULL;
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reopen_on_error = 1;
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}
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if (_zip_rename(temp, za->zn) != 0) {
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_zip_error_set(&za->error, ZIP_ER_RENAME, errno);
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remove(temp);
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free(temp);
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if (reopen_on_error) {
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/* ignore errors, since we're already in an error case */
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za->zp = fopen(za->zn, "rb");
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}
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return -1;
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}
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mask = umask(0);
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umask(mask);
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chmod(za->zn, 0666&~mask);
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_zip_free(za);
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free(temp);
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return 0;
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}
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static int
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add_data(struct zip *za, struct zip_source *zs, struct zip_dirent *de, FILE *ft)
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{
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off_t offstart, offend;
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zip_source_callback cb;
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void *ud;
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struct zip_stat st;
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cb = zs->f;
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ud = zs->ud;
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if (cb(ud, &st, sizeof(st), ZIP_SOURCE_STAT) < (ssize_t)sizeof(st)) {
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ch_set_error(&za->error, cb, ud);
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return -1;
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}
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if (cb(ud, NULL, 0, ZIP_SOURCE_OPEN) < 0) {
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ch_set_error(&za->error, cb, ud);
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return -1;
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}
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offstart = ftello(ft);
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if (_zip_dirent_write(de, ft, 1, &za->error) < 0)
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return -1;
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if (st.comp_method != ZIP_CM_STORE) {
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if (add_data_comp(cb, ud, &st, ft, &za->error) < 0)
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return -1;
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}
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else {
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if (add_data_uncomp(za, cb, ud, &st, ft) < 0)
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return -1;
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}
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if (cb(ud, NULL, 0, ZIP_SOURCE_CLOSE) < 0) {
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ch_set_error(&za->error, cb, ud);
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return -1;
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}
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offend = ftello(ft);
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if (fseeko(ft, offstart, SEEK_SET) < 0) {
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_zip_error_set(&za->error, ZIP_ER_SEEK, errno);
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return -1;
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}
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de->last_mod = st.mtime;
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de->comp_method = st.comp_method;
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de->crc = st.crc;
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de->uncomp_size = st.size;
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de->comp_size = st.comp_size;
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if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0))
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_zip_dirent_torrent_normalize(de);
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if (_zip_dirent_write(de, ft, 1, &za->error) < 0)
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return -1;
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if (fseeko(ft, offend, SEEK_SET) < 0) {
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_zip_error_set(&za->error, ZIP_ER_SEEK, errno);
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return -1;
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}
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return 0;
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}
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static int
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add_data_comp(zip_source_callback cb, void *ud, struct zip_stat *st,FILE *ft,
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struct zip_error *error)
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{
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char buf[BUFSIZE];
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ssize_t n;
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st->comp_size = 0;
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while ((n=cb(ud, buf, sizeof(buf), ZIP_SOURCE_READ)) > 0) {
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if (fwrite(buf, 1, n, ft) != (size_t)n) {
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_zip_error_set(error, ZIP_ER_WRITE, errno);
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return -1;
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}
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st->comp_size += n;
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}
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if (n < 0) {
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ch_set_error(error, cb, ud);
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return -1;
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}
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return 0;
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}
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static int
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add_data_uncomp(struct zip *za, zip_source_callback cb, void *ud,
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struct zip_stat *st, FILE *ft)
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{
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char b1[BUFSIZE], b2[BUFSIZE];
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int end, flush, ret;
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ssize_t n;
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size_t n2;
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z_stream zstr;
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int mem_level;
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st->comp_method = ZIP_CM_DEFLATE;
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st->comp_size = st->size = 0;
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st->crc = crc32(0, NULL, 0);
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zstr.zalloc = Z_NULL;
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zstr.zfree = Z_NULL;
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zstr.opaque = NULL;
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zstr.avail_in = 0;
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zstr.avail_out = 0;
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if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0))
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mem_level = TORRENT_MEM_LEVEL;
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else
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mem_level = MAX_MEM_LEVEL;
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/* -MAX_WBITS: undocumented feature of zlib to _not_ write a zlib header */
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deflateInit2(&zstr, Z_BEST_COMPRESSION, Z_DEFLATED, -MAX_WBITS, mem_level,
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Z_DEFAULT_STRATEGY);
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zstr.next_out = (Bytef *)b2;
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zstr.avail_out = sizeof(b2);
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zstr.next_in = NULL;
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zstr.avail_in = 0;
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flush = 0;
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end = 0;
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while (!end) {
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if (zstr.avail_in == 0 && !flush) {
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if ((n=cb(ud, b1, sizeof(b1), ZIP_SOURCE_READ)) < 0) {
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ch_set_error(&za->error, cb, ud);
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deflateEnd(&zstr);
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return -1;
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}
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if (n > 0) {
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zstr.avail_in = n;
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zstr.next_in = (Bytef *)b1;
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st->size += n;
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st->crc = crc32(st->crc, (Bytef *)b1, n);
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}
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else
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flush = Z_FINISH;
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}
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ret = deflate(&zstr, flush);
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if (ret != Z_OK && ret != Z_STREAM_END) {
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_zip_error_set(&za->error, ZIP_ER_ZLIB, ret);
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return -1;
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}
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if (zstr.avail_out != sizeof(b2)) {
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n2 = sizeof(b2) - zstr.avail_out;
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if (fwrite(b2, 1, n2, ft) != n2) {
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_zip_error_set(&za->error, ZIP_ER_WRITE, errno);
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return -1;
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}
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zstr.next_out = (Bytef *)b2;
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zstr.avail_out = sizeof(b2);
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st->comp_size += n2;
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}
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if (ret == Z_STREAM_END) {
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deflateEnd(&zstr);
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end = 1;
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}
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}
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return 0;
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}
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static void
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ch_set_error(struct zip_error *error, zip_source_callback cb, void *ud)
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{
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int e[2];
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if ((cb(ud, e, sizeof(e), ZIP_SOURCE_ERROR)) < (ssize_t)sizeof(e)) {
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error->zip_err = ZIP_ER_INTERNAL;
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error->sys_err = 0;
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}
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else {
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error->zip_err = e[0];
|
||
error->sys_err = e[1];
|
||
}
|
||
}
|
||
|
||
|
||
|
||
static int
|
||
copy_data(FILE *fs, off_t len, FILE *ft, struct zip_error *error)
|
||
{
|
||
char buf[BUFSIZE];
|
||
int n, nn;
|
||
|
||
if (len == 0)
|
||
return 0;
|
||
|
||
while (len > 0) {
|
||
nn = len > sizeof(buf) ? sizeof(buf) : len;
|
||
if ((n=fread(buf, 1, nn, fs)) < 0) {
|
||
_zip_error_set(error, ZIP_ER_READ, errno);
|
||
return -1;
|
||
}
|
||
else if (n == 0) {
|
||
_zip_error_set(error, ZIP_ER_EOF, 0);
|
||
return -1;
|
||
}
|
||
|
||
if (fwrite(buf, 1, n, ft) != (size_t)n) {
|
||
_zip_error_set(error, ZIP_ER_WRITE, errno);
|
||
return -1;
|
||
}
|
||
|
||
len -= n;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
static int
|
||
write_cdir(struct zip *za, struct zip_cdir *cd, FILE *out)
|
||
{
|
||
off_t offset;
|
||
uLong crc;
|
||
char buf[TORRENT_CRC_LEN+1];
|
||
|
||
if (_zip_cdir_write(cd, out, &za->error) < 0)
|
||
return -1;
|
||
|
||
if (zip_get_archive_flag(za, ZIP_AFL_TORRENT, 0) == 0)
|
||
return 0;
|
||
|
||
|
||
/* fix up torrentzip comment */
|
||
|
||
offset = ftello(out);
|
||
|
||
if (_zip_filerange_crc(out, cd->offset, cd->size, &crc, &za->error) < 0)
|
||
return -1;
|
||
|
||
snprintf(buf, sizeof(buf), "%08lX", (long)crc);
|
||
|
||
if (fseeko(out, offset-TORRENT_CRC_LEN, SEEK_SET) < 0) {
|
||
_zip_error_set(&za->error, ZIP_ER_SEEK, errno);
|
||
return -1;
|
||
}
|
||
|
||
if (fwrite(buf, TORRENT_CRC_LEN, 1, out) != 1) {
|
||
_zip_error_set(&za->error, ZIP_ER_WRITE, errno);
|
||
return -1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
static int
|
||
_zip_cdir_set_comment(struct zip_cdir *dest, struct zip *src)
|
||
{
|
||
if (src->ch_comment_len != -1) {
|
||
dest->comment = _zip_memdup(src->ch_comment,
|
||
src->ch_comment_len, &src->error);
|
||
if (dest->comment == NULL)
|
||
return -1;
|
||
dest->comment_len = src->ch_comment_len;
|
||
} else {
|
||
if (src->cdir && src->cdir->comment) {
|
||
dest->comment = _zip_memdup(src->cdir->comment,
|
||
src->cdir->comment_len, &src->error);
|
||
if (dest->comment == NULL)
|
||
return -1;
|
||
dest->comment_len = src->cdir->comment_len;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
static int
|
||
_zip_changed(struct zip *za, int *survivorsp)
|
||
{
|
||
int changed, i, survivors;
|
||
|
||
changed = survivors = 0;
|
||
|
||
if (za->ch_comment_len != -1
|
||
|| za->ch_flags != za->flags)
|
||
changed = 1;
|
||
|
||
for (i=0; i<za->nentry; i++) {
|
||
if ((za->entry[i].state != ZIP_ST_UNCHANGED)
|
||
|| (za->entry[i].ch_comment_len != -1))
|
||
changed = 1;
|
||
if (za->entry[i].state != ZIP_ST_DELETED)
|
||
survivors++;
|
||
}
|
||
|
||
*survivorsp = survivors;
|
||
|
||
return changed;
|
||
}
|
||
|
||
|
||
|
||
static char *
|
||
_zip_create_temp_output(struct zip *za, FILE **outp)
|
||
{
|
||
char *temp;
|
||
int tfd;
|
||
FILE *tfp;
|
||
|
||
if ((temp=(char *)malloc(strlen(za->zn)+8)) == NULL) {
|
||
_zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
|
||
return NULL;
|
||
}
|
||
|
||
sprintf(temp, "%s.XXXXXX", za->zn);
|
||
|
||
if ((tfd=mkstemp(temp)) == -1) {
|
||
_zip_error_set(&za->error, ZIP_ER_TMPOPEN, errno);
|
||
free(temp);
|
||
return NULL;
|
||
}
|
||
|
||
if ((tfp=fdopen(tfd, "r+b")) == NULL) {
|
||
_zip_error_set(&za->error, ZIP_ER_TMPOPEN, errno);
|
||
close(tfd);
|
||
remove(temp);
|
||
free(temp);
|
||
return NULL;
|
||
}
|
||
|
||
*outp = tfp;
|
||
return temp;
|
||
}
|
||
|
||
|
||
|
||
static int
|
||
_zip_torrentzip_cmp(const void *a, const void *b)
|
||
{
|
||
return strcasecmp(((const struct filelist *)a)->name,
|
||
((const struct filelist *)b)->name);
|
||
}
|